2020年7月黑龙江极端少雨成因初探
娄德君, 李永生, 王永光, 陈晨, 张健

Preliminary study on the causes of extremely less precipitation in Heilongjiang Province in July 2020
LOU Dejun, LI Yongsheng, WANG Yongguang, CHEN Chen, ZHANG Jian
图3 7月异常少雨年合成的500 hPa位势高度场(a,等值线,单位:gpm)、200 hPa纬向风场
(b,等值线,单位:m·s-1)、850 hPa风场(c,矢量,单位:m·s-1)和整层水汽通量(矢量,单位:kg·m-1·s-1)及水汽通量散度(填色区,单位:10-5 kg·m-2·s-1)(d)距平
(深、浅灰色区分别为通过α=0.01、0.05显著性检验的少雨年与多雨年环流差值场)
Fig.3 Composite anomaly fields of 500 hPa geopotential height (a, contours, Unit: gpm), 200 hPa zonal wind (b, contours, Unit: m·s-1), 850 hPa wind field (c, vectors, Unit: m·s-1) and integrated water vapor flux (vectors, Unit: kg·m-1·s-1) and water vapor flux divergence (color shaded areas, Unit: 10-5 kg·m-2·s-1) (d) in years with abnormally less rain in July
(Dark and light grey areas indicate the differences between circulations in July of less and more rain years passing the significance tests at 0.01 and 0.05 level, respectively)